Evaluating roadway subsurface drainage practices – phase II.

Details

• Creators:
  Ceylan, Halil ; Kim, Sunghwan ; Gopalakrishnan, Kasthurirangan ; Steffes, Robert F. ; Yang, Bo
• Corporate Creators:
  Iowa State University. Institute for Transportation
• Corporate Contributors:
  Iowa. Highway Research Board ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Subsurface drainage
  • Subdrains
  • Pavement design
  • Pavement distress
  • Pavement maintenance
  • Portland cement concrete
  • Concrete pavements
  • Hot mix asphalt
  • Limestone
• Publication/ Report Number:
  IHRB Project TR-662;InTrans Project 13-473
• Resource Type:
  Tech Report
• Geographical Coverage:
  Iowa
• Corporate Publisher:
  Iowa State University. Institute for Transportation
• Abstract:
  Well-performing subsurface drainage systems form an important aspect of pavement design by the Iowa Department of ; Transportation (DOT). The recently completed Iowa Highway Research Board (IHRB) project TR-643 provided extensive ; insights into Iowa subsurface drainage practices and pavement subdrain outlet performance. However, the project TR-643 (Phase ; I) forensic testing and evaluation were carried out in a drought year and during the fall season in 2012. Based on the findings of ; IHRB Project TR-643, the Iowa DOT requested an expanded Phase II study to address several additional research needs: evaluate ; the seasonal variation effects (dry fall 2012 versus wet spring/summer 2013, etc.) on subdrain outlet condition and performance; ; investigate the characteristics of tufa formation in Iowa subdrain outlets; investigate the condition of composite pavement ; subdrain outlets; examine the effect of resurfacing/widening/rehabilitation on subdrain outlets (e.g., the effects of patching on ; subdrain outlet performance); and identify a suitable drain outlet protection mechanism (like a headwall) and design for Iowa ; subdrain outlets based on a review of practices adopted by nearby states. ; A detailed forensic test plan was developed and executed for inspecting the Iowa pavement subdrains in pursuit of fulfilling the ; Phase II study objectives. The observed outlets with blockage and the associated surface distresses in newly constructed jointed ; plain concrete pavements (JPCPs) were slightly higher during summer 2013 compared to fall 2012. However, these differences ; are not significant. Less tufa formation due to the recycled portland cement concrete (RPCC) base was observed with (a) the use ; of plastic outlet pipe without the gate screen–type rodent guard and (b) the use of blended RPCC and virgin aggregate materials. ; In hot-mix asphalt (HMA) over JPCP, moisture-related distress types (e.g., reflection cracking) were observed more near blocked ; drainage outlet locations than near “no blockage” outlet locations. This finding indicates that compromised drainage outlet ; performance could accelerate the development of moisture-related distresses in Iowa composite pavement systems.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28857/dot_28857_DS1.pdf
• File Type:
  [PDF - 6.77 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:e96b99caec92e1284c1c335769154bf1e72c802f16452c5bed2adae59c3c88d417652520d4dde41782bc3c43f9b823bdba6963d38125c59d83336c7465988971